/Engine/Plugins/Runtime/XRBase/Source/XRBase/Public/MotionTrackedDeviceFunctionLibrary.h
Returns a list of all available motion sources (FNames associated with discrete tracking data that can be used to drive MotionControllerComponents).
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Input|MotionTracking") static [TArray](API\Runtime\Core\Containers\TArray)< [FName](API\Runtime\Core\UObject\FName) > EnumerateMotionSources()